"There should be a balance between eating healthy and continuing to exercise," she said. "I have made a conscious effort to add more to my diet. Now, my husband says stop putting nuts and cheese on everything."
Joyce now sees a nutritionist in anticipation of a second pregnancy, and hopes to have "the best of both worlds."
"I keep up my activity and I eat healthy," she said. "I can't wait to get back running. I have a few high goals and the rest is for fun."
ABC News' On Campus reporter Marlei Martinez contributed to this story.